Temperature alarm



July 24, 1923. 4 '1,462,887l

O. H. LUDEMAN TEMPERATURE ALARM Original Filed Dec. 20. 1921' \/J:\I\ l /fr` [I f IH-?"- 5 1H .ii |H| 'l im m rm il .'l Htl '-k- /J l I i I l /7 Patented lluly 24, 1923.

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OSCAR H. LUDEMAN, OFGLEN RIDGE, v.lifllii JERSEY.-

TEMPERATURE ALARM.

Application filed DecemberV 20, 1921. `Serial 1\To.y 523,792.

To @ZZ whom 'it maig/ concern:

Be it known that I, OscAR H. LUDEMAN, a citizen of the United States, and a resident of Glen Ridge, county of Hudson, and State of New Jersey, have invented a new and Improved Temperature Alarm, or" which the following is a specification.

My invention relates to the class of devices that are employed to denote a certain stage in temperature, my improved device being especially applicable for denoting an excessive rise in temperature as in an engine, and an object of my invention, among others, is to provide a device that is eX- tremely simple in construction and eilective in operation, to produce an audible signal.

One form of my signal device embodying my invention and in the construction and use of which the objects herein set out, as

well as others, may be atta-ined' is illustrated in the accompanying drawings, in which- Figure 1 is a view in side elevation of a gas engine showing one means for attachment of my improved signaling device thereto.

Figure 2 is a view in side elevation of my improved signal.

Figure 3 is a view in central vertical section through my improved signaling device with inner members broken away to show construction.

Figure 4 is a view in cross section on a plane denoted by the dotted line -t-i ot F ifure 3.

n the accompanying drawings the numeral indicates a gas engine of any suitable construction and comprisinga cylinder head 6 that is provided Awith the usual chambers for water or similar cooling medium, which chamber communicates as byv lation my improved signal being so attached that it will receive the water or other cooling medium usedin the engine. The device may be arranged to receive such cooling medium directly from one of the passages containing such medium, or it may be supported as on the clash-board 9, and as illustrated in dotted lines in Fig. 1, with an extension tothe water jacket of the engine by means of which the device will be sup- .plied with a cooling medium.

In that arrangement as illustrated and described herein my improved signal is attached directly to the cylinder head 6 as by means of a threaded nipple located in a threaded hole extending into the water chamber in the cylinder head. This device comprises a shell 10 having a threaded nipple 11 as a means for securing the shell in place. This is preferably of angular shapey as at 12 as a means for securing it in place as by means of a wrench or other suitable tool. In this manner the shell is adapted to receive within its interior the water or other cooling medium directly from the engine. A cap 13 comprises a portion of the shell, this cap being secured in place in any suitable manner, as by spinning the upper edge of the shell into a groove in the edge of the cap, a support 14E rising from the cap a short distance, andas illustrated in Fig. 3 of the drawings. A bell 15 `of any suitable form rests upon the support 14 and is easily movable thereon eX- cept when held from such movement, inthe structure herein shown this bell being held from such movement when the temperature of the engine and consequently of the water or other cooling medium within the shellis within safe limits. y

To affect this purpose I employ a thermostat that may be of any ordinary-construction, that herein shown comprising a case 16 that contains, as is common in devices of this sort,y ether, alcohol, or other suitable material, that will operate under changed temperature conditions to actuate a controller 17, this controller being of bellows shape and that will readily contract and expand under the changing temperature conditions of the material within the case. In adapting this thermostat for operation as embodied in `my improved signal a controller rod 18 is secured to thebottom of the controller 17, extending upwardly therethrough and having at its upper end a controller head 19, positioned to overlie the upper end of the bell 15, the rod 18 extending through anopening in this end ot the bell, which opening is of a size considerably larger than that of the rod, so that the latter will not, when the head is raised from the bell, interfere with the free swinging movement of' the bell upon the support 14.

The operation of this device will be readily understood, it being noted that as the heat of the engine increases the temperature of the water therein will rise and thisv will be communicated to the water in the interior of the shell 10 and thence to the liquid within the case 16. lThis will operate to contract the lcontroller 17 thereby gradually lifting the controller head19 from engagement with thev bell, and the'partswill be so arranged that when the heat reaches a dangerous point the contraction of the controller will be sufficient to raise the head 19 enough to permit the bell to swing so that its lower end will engage the sides of the shell 10 and thereby produce an. audible alarm. The vibration of the vehicle by which the bell is carried will be su'icient to cause the bell to be swung so that it will make Contact with the shell 10 whenever the head 19 is raised enough for this pur pose.

I claiml. A signal comprising a hollow support, a sounding device loosely mounted on said support for movementI thereon to sound an alarm, a device movably affected by changes in temperature and located within said support, and a controller operatively connected with said device and with said sounding device to controlthe movements of the latter.

2. A signal comprising a hollow support adapted tov receive a fiuid, a sounding device loosely mounted on said support for n movement thereon to sound an alarm, a device movably affected by changes in temperature and located within said support to be aflected by the temperature of the fluid therein, and a controller operatively connected with said device and with said sounding device to control the movementsv said support and including an expansible and'contractible member, a rod extending from said member to -be actuated thereby, and a head on said rod positioned to engage said sounding device to control its condition as to movability or immovability.

5. A signal comprising a shell, a support rising from .said shell, a sounding device loosely vmounted on said support, la device movably afected by changes in temperature and located within said shell and including an eXpansible and contractible member, and a controller operatively connected with said member and positioned to yengage said sounding device to controlits condition as to movability or immovability. v

6. A signal comprising a hollow support adapted to receive a fluid, a sounding device loosely mounted on said support, a4 device movably affected by changes in tempera-ture and located within said support and rigidly secured thereto and including an explansible and contractible member, 'a rod rising from the botto-m of said member through said support and said sounding device, and a head on said rod positioned to control the movements of said sounding device.

7; A signal comprising a hollow support having means for attachment to the wall of a wat-er chamber to receive fluid therefrom, a, sounding device looselymounted on said support, a device movably affected by changes in temperature and located Within said support and comprising an expansible and -contractible member and a controller operatively connected with said member and positioned to engage said sounding device to control its movements.

8. A signal comprising a portable traveling support, a 'signal device loosely mounted on said support for movement thereon'to sound an alarm, a device movably'afected by changes in temperature and a controller operatively connected with said-device last mentioned and with said vsounding device to hold the latter against movement on its support and to permit such movement.l

9. A signal comprising'a hollow support,

a sounding device loosely mounted to move independently of said support to sound an alarm, a device movably affected by changes in temperature and located Within said support and including an eXtensible and contractible member, a rod extending from said member to be actuated thereby, and a head on said rod positioned to engage said sounding device to control its condition as to movability or immovability.

OSCAR H. LUDEMAN.

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